Technically, the title does not require a colon because Trek is a verb. It’s like if I were to say, “I’m going to trek into the woods for firewood.” Although it should probably be titled, “To Star Trek into Darkness”

Maybe Shatner is back. The Enterprise is shrunk in order to fly up an an elderly Kirk’s a** (a trek into darkness) and perform a colonectomy, i.e. no colon in the name. Yep, that must be the answer, has to be.